3 years ago

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Mathematics

1 answer:

Sergeu [11.5K]3 years ago

8 0

I think you forgot to write the question, haha!

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1) 5x-2y=4. 2) 3x-5y=13 x-2y=5 3x+y=9

Natali [406]

$\left\{\begin{array}{ccc}5x-2y=4\\3x+y=9&/\cdot2\end{array}\right\\+\left\{\begin{array}{ccc}5x-2y=4\\6x+2y=18\end{array}\right\\----------\\.\ \ \ \ \ 11x=22\ \ \ \ /:11\\.\ \ \ \ \ \ \ x=2\\\\3\cdot2+y=9\\6+y=9\\y=9-6\\y=3\\\\Answer:x=2;\ y=3$

$\left\{\begin{array}{ccc}3x-5y=13\\x-2y=5\end{array}\right\\\left\{\begin{array}{ccc}3x-5y=13\\x=2y+5\end{array}\right\\\\substitute:\\\\3(2y+5)-5y=13\\6y+15-5y=13\\y=13-15\\y=-2\\\\x=2\cdot(-2)+5=-4+5=1\\\\Answer:x=1;\ y=-2.$

5 0

2 years ago

In the figure, which angle has the same measure as Z2? A. 21 B. 23 C. 24 D. 25

k0ka [10]

Answer:

I think it is D

Step-by-step explanation:

4 0

2 years ago

What is the period for tangent functions? (Answer in radians)

prisoha [69]

Answer: 2 radians

Step-by-step explanation: You welcome

3 0

2 years ago

F(x)=x^+4x+2 what is the average rate of change from x=3 to x=5

mars1129 [50]

Answer:

Step-by-step explanation:

f(x)=x^+4x+2 First, let's evaluate when x=3, x=4 and x=5.

f(3) = 3²+4(3)+2 = 9 + 12 + 2 = 23

f(4) = 4²+4(4)+2 = 16 + 16 + 2 = 34

f(5) = 5²+4(5)+2 = 25 + 20 + 2 = 47

Now, let's find the rate of change.

34 - 23 = 11

47 - 34 = 13

Finally, the average rate of change.

(11 + 13) / 2 = 12

8 0

3 years ago

Solve 4x - 5 = 19. O A. x = 8 O B. x = 10 C. x = 6 O D. x = 3.5

Basile [38]

Answer:

C x=6

Step-by-step explanation:

4x-5=19

+5 on both sides

4x=24

divide both sides by 4

x=6

6 0

1 year ago